Man pages matching name pqparamexecprepared in section 3:

PQparamExecPrepared.3.en	debian 10 / libpqtypes-dev
PQparamExecPrepared.3.en	debian 11 / libpqtypes-dev
PQparamExecPrepared.3.en	debian 12 / libpqtypes-dev